401235660 has 192 divisors, whose sum is σ = 1437004800. Its totient is φ = 91044864.

The previous prime is 401235647. The next prime is 401235689. The reversal of 401235660 is 66532104.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 676324 + ... + 676916.

It is an arithmetic number, because the mean of its divisors is an integer number (7484400).

Almost surely, 2^401235660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401235660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (718502400).

401235660 is an abundant number, since it is smaller than the sum of its proper divisors (1035769140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401235660 is a wasteful number, since it uses less digits than its factorization.

401235660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 401235660 is about 20030.8676796588. The cubic root of 401235660 is about 737.5642215452.

Adding to 401235660 its reverse (66532104), we get a palindrome (467767764).

The spelling of 401235660 in words is "four hundred one million, two hundred thirty-five thousand, six hundred sixty".